CN112681999B

CN112681999B - Compression packer

Info

Publication number: CN112681999B
Application number: CN202110261858.3A
Authority: CN
Inventors: 庞兰霞
Original assignee: Daqing Danfeng Petroleum Technology Development Co ltd
Current assignee: DAQING DANFENG PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd.
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-06-15
Anticipated expiration: 2041-03-10
Also published as: CN112681999A

Abstract

The invention provides a compression packer, and relates to the field of oilfield exploitation equipment. This compression packer, including the center tube, the inside left and right sides of center tube all is provided with the water conservancy diversion chamber, water conservancy diversion chamber bottom all links to each other with advancing the chamber, it has the push pedal to advance chamber middle part inner wall department sliding connection, the equal fixed connection in connecting rod one end in upper and lower both sides that water conservancy diversion chamber one end was kept away from to the push pedal, the connecting rod other end all runs through advances inboard one end of chamber and equipment chamber and fixed connection at the slider. Through injecting hydraulic oil into the center tube and getting into the propelling movement chamber through the water conservancy diversion chamber, realize the removal of push pedal in the propelling movement intracavity under the effect of pressure, finally realize the relative motion of first compression board and second compression board, realize extruding the packing element simultaneously through first compression board and second compression board, thereby make the packing element atress even, the ability of the outside expansion of packing element has been increased, the stability and the leakproofness of sitting and sealing have been improved, the life of packing element has been improved simultaneously, be worth wideling popularize.

Description

Compression packer

Technical Field

The invention relates to the technical field of oilfield exploitation equipment, in particular to a compression packer.

Background

The packer is an underground tool which is provided with an elastic sealing element, seals annular spaces between pipe columns with various sizes and well bores and between the pipe columns and isolates a production zone to control production (injection) fluid and protect a casing, the types of the packer are various, common packers include a self-sealing packer, a compression packer, a wedging packer, an expansion packer and a combined packer, and at present, the packer is widely applied to operations such as well drilling, well cementation, testing, well completion and the like and can also be used for underground petroleum operation.

In the compression packer who uses to the oil field exploitation in the present stage, extrude the packing element through single compression board basically, make the packing element receive external force effect down to produce deformation, thereby external expansion, realize the effect of packing, but in the traditional mode, single compression board extrudees the packing element and easily causes the inhomogeneous condition of packing element atress, thereby lead to the packing element expansion strength not enough, the unstable or the relatively poor problem of leakproofness of sitting seal easily exists, simultaneously under long-term unilateral extruded effect, the life of packing element has been shortened, thereby the cost of increase use.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a compression packer, which solves the problems of uneven stress of a rubber cylinder, insufficient expansion strength of the rubber cylinder and short service life of the rubber cylinder.

In order to achieve the purpose, the invention is realized by the following technical scheme: compression packer, including the center tube, the inside left and right sides of center tube all is provided with the water conservancy diversion chamber, water conservancy diversion chamber bottom all links to each other with advancing the chamber, it has the push pedal to advance chamber middle part inner wall department sliding connection, the equal fixed connection in connecting rod one end in the upper and lower both sides that water conservancy diversion chamber one end was kept away from to the push pedal, the connecting rod other end all runs through advances chamber and equipment chamber and fixed connection at the inboard one end of slider, the equal sliding connection in slider inside through-hole department has the dead lever, slider top center department all rotates and connects in first dwang one end, the first dwang other end all rotates the bottom of connecting in the inboard one end of first rack board, slider bottom center department all rotates and connects in second dwang one end, the second dwang other end all.

Preferably, the inside through-hole department of first rack board and second rack board is sliding connection in the upper and lower both sides of first pole setting respectively, the equal meshing of tooth department at first rack board outside one end top is connected with first gear, the equal meshing of first gear outside one end is connected at the middle part of the inboard one end of third rack board, the first compression board of the equal fixedly connected with in third rack board bottom, the equal meshing of tooth department of the bottom of second rack board outside one end is connected with the second gear, the equal meshing of second gear outside one end is connected at the middle part of the inboard one end of fourth rack board, the equal fixedly connected with second compression board in fourth rack board top, be provided with the packing element between first compression board and the second compression board.

Preferably, the center of the top end of the central tube is fixedly connected with an upper joint, and the bottom end of the central tube is fixedly connected with a lower joint at a position corresponding to the upper joint.

Preferably, the inner through holes of the first gear and the second gear are fixedly connected with rotating shafts, and the front end and the rear end of each rotating shaft are respectively rotatably connected to the inner walls of the front end and the rear end of the equipment cavity.

Preferably, the top ends of the first vertical rods are fixedly connected to the inner wall of the top end of the equipment cavity, and the bottom ends of the first vertical rods are fixedly connected to the inner wall of the bottom end of the equipment cavity.

Preferably, there is a second pole setting in the inside through-hole department sliding connection of third rack board, the equal fixed connection in second pole setting top is on the inner wall on equipment chamber top, the equal sliding connection in the inside through-hole department of fourth rack board has a third pole setting, the equal fixed connection in third pole setting bottom is on the inner wall of equipment chamber bottom.

Preferably, the equal fixedly connected with backup pad of dead lever outside one end, the equal fixed connection of backup pad outside one end is on the inner wall in equipment chamber, first pole setting middle part external diameter department all runs through the backup pad.

Preferably, the left and right side grooves at the upper and lower ends of the central tube are internally provided with rollers.

The working principle is as follows: when the rubber tube extruding machine is used, hydraulic oil is injected into the central tube, the hydraulic oil flows into the pushing cavity through the flow guide cavity, the pushing plate is pushed by the hydraulic oil to slide outwards in the pushing cavity under the action of pressure, the sliding of the sliding block on the fixed rod is realized under the action of the connecting rod, the first rack plate slides upwards on the first vertical rod through the first rotating rod, the third rack plate drives the first compression plate to move downwards under the action of the first gear, the second rack plate slides downwards on the first vertical rod through the second rotating rod, the fourth rack plate drives the second compression plate to move upwards under the action of the second gear, the synchronous relative motion of the first compression plate and the second compression plate is realized, the extrusion on the rubber tube is realized through the first compression plate and the second compression plate, the rubber tube is uniformly stressed, and the outward expansion capacity of the rubber tube is increased at the same time, the contact area between the rubber cylinder and the well wall is increased, the stability and the sealing performance during setting are further improved, the condition that the rubber cylinder is stressed in a single side for a long time is avoided, the service life of the rubber cylinder is effectively prolonged, and the purpose of saving the use cost is achieved.

The invention provides a compression packer. The method has the following beneficial effects:

according to the invention, hydraulic oil is injected into the central pipe and enters the pushing cavity through the flow guide cavity, the push plate is moved in the pushing cavity under the action of pressure, the relative movement of the first compression plate and the second compression plate is finally realized, and the rubber cylinder is simultaneously extruded through the first compression plate and the second compression plate, so that the rubber cylinder is uniformly stressed, the outward expansion capacity of the rubber cylinder is increased, the stability and the sealing performance of the setting are improved, the service life of the rubber cylinder is prolonged, and the rubber cylinder is worthy of great popularization.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an enlarged view at B of FIG. 1;

FIG. 4 is an enlarged view at C of FIG. 1;

fig. 5 is a perspective view of the slider of the present invention.

Wherein, 1, a central tube; 2. a flow guide cavity; 3. a propulsion chamber; 4. pushing the plate; 5. a connecting rod; 6. an equipment chamber; 7. a slider; 8. a first rotating lever; 9. a first rack plate; 10. a second rotating lever; 11. a second rack plate; 12. a first upright rod; 13. a first gear; 14. a third rack plate; 15. a first compression plate; 16. a second gear; 17. a fourth rack plate; 18. a second compression plate; 19. fixing the rod; 20. a rubber cylinder; 21. an upper joint; 22. a lower joint; 23. a rotating shaft; 24. a second upright stanchion; 25. a third upright stanchion; 26. a support plate; 27. and a roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-5, an embodiment of the invention provides a compression packer, which includes a central tube 1, wherein flow guide cavities 2 are respectively disposed on the left side and the right side inside the central tube 1, the bottom ends of the flow guide cavities 2 are both connected with a propulsion cavity 3, a push plate 4 is slidably connected to the inner wall of the middle portion of the propulsion cavity 3, the upper side and the lower side of one end, away from the flow guide cavity 2, of the push plate 4 are both fixedly connected to one end of a connecting rod 5, the other end of the connecting rod 5 penetrates through the propulsion cavity 3 and an equipment cavity 6 and is fixedly connected to one end of the inner side of a slider 7, a fixing rod 19 is slidably connected to the through hole inside the slider 7, the center of the top end of the slider 7 is rotatably connected to one end of a first rotating rod 8, the other end of the first rotating rod 8 is rotatably connected to the bottom of one end.

The inner through holes of the first rack plate 9 and the second rack plate 11 are respectively connected with the upper side and the lower side of the first upright rod 12 in a sliding manner, the teeth at the top of one end of the outer side of the first rack plate 9 are all connected with a first gear 13 in a meshing manner, one end of the outer side of the first gear 13 is all connected with the middle of one end of the inner side of the third rack plate 14 in a meshing manner, the bottom end of the third rack plate 14 is all fixedly connected with a first compression plate 15, the teeth at the bottom of one end of the outer side of the second rack plate 11 are all connected with a second gear 16 in a meshing manner, one end of the outer side of the second gear 16 is all connected with the middle of one end of the inner side of the fourth rack plate 17 in a meshing manner, the top end of the fourth rack plate 17 is all fixedly connected with a second compression plate 18, a rubber cylinder 20 is arranged between the first compression plate 15 and the second compression plate 18, hydraulic oil enters the, the first rack plate 9 can slide upwards on the first upright stanchion 12 through the first rotating rod 8, the third rack plate 14 can drive the first compression plate 15 to move downwards under the action of the first gear 13, the second rack plate 11 can slide downwards on the first upright stanchion 12 through the second rotating rod 10, the fourth rack plate 17 can drive the second compression plate 18 to move upwards under the action of the second gear 16, so that the first compression plate 15 and the second compression plate 18 can move synchronously and simultaneously, the first compression plate 15 and the second compression plate 18 can extrude the rubber cylinder 20 through the first compression plate 15 and the second compression plate 18, the rubber cylinder 20 is uniformly stressed, the outward expansion capacity of the rubber cylinder 20 is increased, the contact area between the rubber cylinder 20 and a well wall is increased, the stability and the sealing performance during setting are improved, the condition that the rubber cylinder 20 is stressed on one side for a long time is avoided, the service life of the rubber cylinder 20 is effectively prolonged, the purpose of saving the use cost is achieved.

The center of the top end of the central tube 1 is fixedly connected with an upper joint 21, the bottom end of the central tube 1 is fixedly connected with a lower joint 22 at a position corresponding to the upper joint 21, and the connection between the whole device and an external device is realized through the upper joint 21 and the lower joint 22.

The rotating shafts 23 are fixedly connected to the inner through holes of the first gear 13 and the second gear 16 respectively, the front end and the rear end of each rotating shaft 23 are rotatably connected to the inner walls of the front end and the rear end of the equipment cavity 6 respectively, the rotating shafts 23 play a role in supporting and fixing the first gear 13 and the second gear 16, and normal rotation of the first gear 13 and the second gear 16 is guaranteed.

The equal fixed connection in first pole setting 12 top is on 6 top inner walls of equipment chamber, and the equal fixed connection in first pole setting 12 bottom is on 6 bottom inner walls of equipment chamber, and first pole setting 12 has guaranteed the normal removal of first rack board 9 and second rack board 11 on the vertical direction.

There is second pole setting 24 in the inside through-hole department sliding connection of third rack plate 14, the equal fixed connection in 24 tops of second pole setting is on the inner wall on 6 tops in equipment chamber, the equal sliding connection in the inside through-hole department of fourth rack plate 17 has third pole setting 25, the equal fixed connection in 25 bottoms of third pole setting is on the inner wall of 6 bottoms in equipment chamber, second pole setting 24 and third pole setting 25 play the effect of supporting fixed third rack plate 14 and fourth rack plate 17 respectively, third rack plate 14 and fourth rack plate 17's normal removal has been guaranteed simultaneously.

The equal fixedly connected with backup pad 26 of dead lever 19 outside one end, the equal fixed connection of backup pad 26 outside one end is on the inner wall in equipment chamber 6, and backup pad 26 all runs through in first pole setting 12 middle part external diameter department, and backup pad 26 plays the support and fixed effect to dead lever 19.

The left and right side grooves at the upper and lower ends of the central tube 1 are internally provided with rollers 27, and the rollers 27 facilitate the rising or falling of the packer body in the oil well.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Compression packer, including center tube (1), its characterized in that: the left side and the right side of the inside of the central tube (1) are respectively provided with a flow guide cavity (2), the bottom end of the flow guide cavity (2) is connected with a propulsion cavity (3), the inner wall of the middle part of the propulsion cavity (3) is connected with a push plate (4) in a sliding way, the upper side and the lower side of one end, far away from the flow guide cavity (2), of the push plate (4) are respectively and fixedly connected with one end of a connecting rod (5), the other end of the connecting rod (5) penetrates through the propulsion cavity (3) and an equipment cavity (6) and is fixedly connected with one end of the inner side of a sliding block (7), the through hole of the inside of the sliding block (7) is respectively and fixedly connected with a fixed rod (19) in a sliding way, the center of the top end of the sliding block (7) is respectively and rotatably connected with one end of a first rotating rod (8), the other end of the first, the top of the other end of the second rotating rod (10) is rotatably connected to the top of the inner side one end of the second rack plate (11), the inner through holes of the first rack plate (9) and the second rack plate (11) are respectively connected to the upper side and the lower side of the first vertical rod (12) in a sliding manner, the teeth at the top of the outer side one end of the first rack plate (9) are respectively connected with a first gear (13) in a meshing manner, the outer side one end of the first gear (13) is respectively connected with the middle of the inner side one end of the third rack plate (14) in a meshing manner, the bottom of the third rack plate (14) is respectively and fixedly connected with a first compression plate (15), the teeth at the bottom of the outer side one end of the second rack plate (11) are respectively connected with a second gear (16) in a meshing manner, the outer side one end of the second gear (16) is respectively connected with the middle of the inner side one end of the fourth rack plate (17), a rubber cylinder (20) is arranged between the first compression plate (15) and the second compression plate (18).

2. The compression packer of claim 1, wherein: the center of the top end of the central tube (1) is fixedly connected with an upper joint (21), and the bottom end of the central tube (1) is fixedly connected with a lower joint (22) at a position corresponding to the upper joint (21).

3. The compression packer of claim 2, wherein: the inner through holes of the first gear (13) and the second gear (16) are fixedly connected with a rotating shaft (23), and the front end and the rear end of the rotating shaft (23) are respectively connected to the inner walls of the front end and the rear end of the equipment cavity (6) in a rotating mode.

4. The compression packer of claim 2, wherein: the top end of the first vertical rod (12) is fixedly connected to the inner wall of the top end of the equipment cavity (6), and the bottom end of the first vertical rod (12) is fixedly connected to the inner wall of the bottom end of the equipment cavity (6).

5. The compression packer of claim 2, wherein: third rack plate (14) inside through-hole department sliding connection has second pole setting (24), the equal fixed connection in second pole setting (24) top is on the inner wall on equipment chamber (6) top, the equal sliding connection in fourth rack plate (17) inside through-hole department has third pole setting (25), the equal fixed connection in third pole setting (25) bottom is on the inner wall of equipment chamber (6) bottom.

6. The compression packer of claim 1, wherein: the equal fixedly connected with backup pad (26) in dead lever (19) outside one end, the equal fixed connection in backup pad (26) outside one end is on the inner wall in equipment chamber (6), backup pad (26) are all run through in first pole setting (12) middle part external diameter department.

7. The compression packer of claim 1, wherein: and rollers (27) are arranged in the grooves on the left side and the right side at the upper end and the lower end of the central tube (1).